The minimum kinetic energy needed to excite a cesium atom by a collision with an oxygen atom can be calculated using the conservation of energy principle.
Explanation:The minimum amount of kinetic energy a particle must have to excite another particle can be calculated using the conservation of energy principle and the equation for kinetic energy. In this case, we are considering the collision between an oxygen atom (O) and a cesium atom (Cs). The formula for calculating the minimum kinetic energy is:
K.E. = (2 * activation energy) + ionization energy
The activation energy is the minimum energy required to initiate the reaction, and the ionization energy is the energy required to remove an electron from an atom. To calculate the specific values for this equation, we need to know the activation energy and the ionization energy of the cesium atom.
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- an object is thrown upwards with a speed of 16 m/s. how long does it take it to reach a height of 7.0 m on the way up?
Final answer:
Calculate the time for an object thrown upwards at 16 m/s to reach a height of 7.0 m.The time it takes the object to reach 7.0 m on the way up is approximately 1.63 seconds.
Explanation:
To find the time it takes for the object to reach a height of 7.0 m on the way up:
Identify the known quantities: Initial velocity (u) = 16 m/s, final velocity (v) = 0 m/s (at the top of its flight), acceleration (a) = -9.8 m/s² (acceleration due to gravity).
Use the kinematic equation: v = u + at and solve for time (t).
Calculate the time taken: t = (v - u) / a.
The time it takes the object to reach 7.0 m on the way up is approximately 1.63 seconds.
What happens to lava as its temperature increases?
Increasing temperature in lava leads to an increase in its thermal energy, causing more vigorous molecular motion and keeping the lava in a liquid state for a longer period. Cooling of the lava involves energy transfer to its surroundings by radiation and conduction, with notable effects such as steam production when lava encounters colder matter.
Explanation:As the temperature of lava increases, the thermal energy content of the lava also increases. This increase in thermal energy causes the vibrational motions within the material to become more vigorous. As a result, when we consider the formation of igneous rock, lava that has a higher temperature will remain in a liquid state for a longer period before it cools and freezes into solid rock. The physical processes associated with a large body of cooling lava involve the transfer of energy through radiation and conduction. Specifically, the rate of energy transfer by radiation from the surface of lava into the surroundings can be calculated using the difference in temperature between the lava's surface, its interior, and the surrounding environment.
The scenario detailed here, with lava cooling from 1200°C in the interior to 450°C at the surface, highlights how heat dissipates from the hotter to the colder areas. The process is analogous to when lava flows into cold ocean water, transferring heat so rapidly that steam is produced. Therefore, as lava temperatures increase, the lava will continue to behave as a hotter substance, capable of transferring high amounts of energy to cooler surrounding areas until an equilibrium is reached.
How many different values of ml are possible in the 5d sublevel?
If an object is moving at a constant speed in one direction, what is needed to change its speed or direction?
A. a balanced force
B. an unbalanced force
C. a long period of time
D. a short period of time
An unbalanced force is needed to change its speed or direction. So, option B.
What is Newton's first law ?Newton's first law states that, an object will continue its state of rest or uniform motion, unless it is acted upon by an external force.
Here,
The object is said to be moving at a constant speed in one direction. So, a force is required to change the speed or direction of its movement.
Depending upon the mass, an object can be slowed down or accelerated by a force. A force has the power to alter the motion of an object. An object will move differently when subjected to a greater force. In order to experience the same change in motion, a heavier item needs to be subjected to a greater force than a lighter object.
The velocity of an object will alter as a result of unbalanced forces. The object has the ability to alter its speed, direction, or both. An object's velocity changes as a result of unbalanced forces acting on it, which provide a net force.
Hence,
An unbalanced force is needed to change its speed or direction. So, option B.
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Compare the size of forces due to static, sliding, and rolling friction between two surfaces.
Static friction is the greatest and occurs when two surfaces are stationary relative to each other. Sliding or kinetic friction is typically less and happens when two surfaces are sliding against each other. Rolling friction is usually the least and occurs when an object rolls over a surface.
Explanation:When comparing the size of forces due to static, sliding, and rolling friction between two surfaces, it's important to note that different types of friction have different magnitudes. Static friction occurs when two surfaces are stationary relative to each other and it tends to be the greatest type of friction. This is due to the fact that it is overcoming the initial force that keeps an object at rest.
On the other hand, sliding friction or kinetic friction, is typically less than static friction. This type of friction happens when two surfaces are sliding against each other. As the surfaces are in motion, it's easier to maintain that motion, thus requiring less opposing force.
Lastly, rolling friction is generally the least among the three. It occurs when an object rolls over a surface, such as a wheel over a road. Because only a small portion of the object is in contact with the surface at any given time, there is less surface area creating resistance, and thus less friction. However, the actual magnitude of these forces depends on the specific materials of the two surfaces in contact and the normal force acting on the objects.
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Please Help:
A torpedo fired from a submarine is propelled through the water at the speed of 20.00m/s it explodes on a target 100.0s away. if the sound of the explosion is heard on the sub at 101.4s after launch, what is the speed of sound in water?
How do I work these out and what is the answer
Reyna kicks a ball, which then rolls across a grassy field. Which is the best explanation for why the ball eventually comes to a stop?
A. The force of gravity pulls the ball down into the grass until it can no longer move
B. The force of friction between the ball and the grass slows the ball to a stop.
C. The force from air resistance slows the ball to a stop.
D. A force is not necessary because all things naturally come to a stop.
Option B is correct:)
Sorry im so late!
Answer:
B. The force of friction between the ball and the grass slows the ball to a stop.
Explanation:
When Reyna kicks the ball the force due to contact between her foot and ball accelerate the ball and hence it starts moving on the grass
But after some time ball stops rolling on the grass. So we can conclude here that there must be some external force on the ball due to which it stops rolling on the grass.
As we know that state of motion of an object will change only when some external unbalanced force act on an object.
So here this external unbalanced force is due to grass which resist the motion of ball and it stops.
Here this resistance force is known as friction force of grass on the ball which resist the motion of ball and it stops so correct answer will be
B. The force of friction between the ball and the grass slows the ball to a stop.
What is the approximate wavelength of a light whose second-order dark band forms a diffraction angle of 15.0° when it passes through a diffraction grating that has 250.0 lines per mm?
Answer:
Homeboy up top was right its 414nm^^^
Explanation:
EDGE2021
Which of the following is a unit of volume of solids?
Cubic meters
Square meters
Liters per cubic gram
Gram per cubic centimeter
Answer:
Cubic meters is the unit of volume.
Explanation:
Volume :
Volume is the multiplication of height, width and length of the solids.
In mathematically term,
[tex]V = w\times l\times d[/tex]
Where, w = width
h = height
l = length
Put the unit into the formula
[tex]V = m\times m\times m[/tex]
[tex]V =m^3[/tex]
This is the unit of volume.
We know that,
Square meters is the unit of area.
Liters per cubic gram is the unit of density.
Gram per cubic centimeter is the unit of density in CGS.
Hence, Cubic meters is the unit of volume.
The labels of the axes in a line graph consist of _____. A. only the units of measurement B. only the variable name C. the variable name and units D.
the relationship shown
Answer:only the variable name
20 PTS! HELP PLS!
The following devices depend on energy transformations. For each device, name the form of energy that is transformed and the resulting form of energy.
1)An electric light bulb
_________ energy is transformed into _________ energy and _________ energy.
2) A battery
_________energy is transformed into _________ energy and _________ energy.
How was the formation of the outer planets affected by their distance from the sun?
The formation of the outer planets are affected by their distance from the sun with having them to maintain the lighter elements that they are composed of such as the hydrogen and helium, having them far away will also make their planet more cooler as the sun is distant from them.
The formation of the outer planets, like Uranus and Neptune, was affected by their distance from the Sun as they likely formed closer to where Jupiter and Saturn are now. The low density of matter in the disk surrounding the Sun outside the orbit of Saturn made it difficult for Uranus and Neptune to form at their present distances. Computer models show that gravitational interactions with neighboring planets could have caused Uranus and Neptune to move to their current locations.
Explanation:The formation of the outer planets, such as Uranus and Neptune, was affected by their distance from the Sun. According to astronomers, these planets likely did not form at their present distances but closer to where Jupiter and Saturn are now. This is because the density of matter in the disk around the Sun at the time of planet formation was too low outside the orbit of Saturn to build up Uranus and Neptune in a reasonable amount of time. Computer models suggest that Uranus and Neptune could have formed near Jupiter and Saturn and then moved to their current locations through gravitational interactions with their neighboring planets.
What type of matter will determine how much inertia an object has?
Which statement is correct? Theories are accepted as true when a single experiment yields similar results to another one. When a scientist finds a new way to test a hypothesis, experimental methods do not change. Theories may be revised over time as information is discovered or technology is developed. When a scientist finds a new way to test a hypothesis, the original theory is made into a law.
Answer:
Theories may be revised over time as information is discovered or technology is developed.
Explanation:
A scientific theory is a set of knowledge related to a particular problem of interest, be it academic or practical. The structure of a theory is formed by the following main elements: problem, evidence, postulates, axioms, questions, hypotheses, predictions, theses, rules and laws. Theory seeks to explain a particular phenomenon or problem of society, so theories can be revised and change as society changes and new technologies and new information are discovered.
A tuning fork produces a sound with a frequency of 256 hz and a wavelength in air of 1.33 m. find the speed of sound in the vicinity of the fork.
Final answer:
The speed of sound in the vicinity of a tuning fork with a frequency of 256 Hz and a wavelength of 1.33 m is approximately 341.28 m/s.
Explanation:
The speed of sound can be calculated using the formula:
Speed of sound = frequency x wavelength
Given:
Frequency of the tuning fork = 256 Hz
Wavelength in air = 1.33 m
Substituting the given values, we get:
Speed of sound = 256 Hz x 1.33 m = 341.28 m/s
Therefore, the speed of sound in the vicinity of the fork is approximately 341.28 m/s.
How much do you know about the water cycle and the impact that humans have on the water cycle?
You perform an experiment in which you find out how much mass evaporates from a liquid when it is placed in direct sunlight or in the shade. Which piece of technology is appropriate for gathering the experimental data you need? A. Tape measure B. Thermometer C. Computer D. Scale
A car traveling at 40.4 m/s skids to a stop in 3.34 s. Determine the skidding distance of the car. (Assume uniform acceleration ) Be sure to show your work.
saad has mass 80 kg when resting on the ground at the equator . what will be the centripetal acceleration on saad if the radius of the earth R is 6.4×10^6 m.
The scientist who incorrectly theorized that it was the positive charge that moved through a circuit was...
A solar-powered car is traveling at constant speed around a circular track. what happens to the centripetal acceleration of the car if the speed is doubled?
a. the centripetal acceleration remains the same.
b. the centripetal acceleration increases by a factor of 2.
c. the centripetal acceleration is decreased by a factor of one-fourth.
d. the centripetal acceleration increases by a factor of 4.
e. the centripetal acceleration is decreased by a factor of one-half. answer:
3. The function of the _______ is to convert the up-and-down motion of the piston into rotary motion that can be used to power the vehicle.
If while riding in a smooth-riding train, you toss a coin upward, the coin will normally land ______.
Final answer:
The coin will typically return to your hand.
Explanation:
When you toss the coin upward, it follows a parabolic trajectory due to the force of gravity acting on it. However, because you and the coin are moving at the same velocity and in the same direction as the train, no external horizontal forces are acting on the coin. As a result, the coin maintains its horizontal velocity relative to you throughout its motion. This means that while the coin moves vertically, its horizontal position relative to you remains unchanged. Consequently, as the coin descends, it will ultimately land back in your hand, following the same vertical path it took when tossed upward.
An object with a mass of 5 kg is dropped and takes 9 s to hit the ground. then another object with a mass of 10 kg is dropped from the same point. how long does it take to hit the ground
The time taken for an object to hit the ground is independent of its mass when air resistance is neglected. Therefore, the second object will also take 9 seconds to hit the ground.
Understanding the Effect of Mass on Free Fall
When you drop an object, its time to reach the ground is determined by the laws of physics related to free fall. Under the influence of gravity, all objects fall at the same rate regardless of their mass, assuming we are neglecting air resistance.
Given: Mass of first object, [tex]m_1 = 5 kg[/tex], Time to hit the ground, [tex]t_1 = 9 s.[/tex]
The second object has a mass, [tex]m_2 = 10 kg[/tex]. To find the time [tex]t_2[/tex] to hit the ground for the second object:
Since both objects are dropped from the same height and air resistance is neglected, the time taken [tex](t_2)[/tex] by the second object to reach the ground is not dependent on its mass and will be the same as the first object.
Thus, the second object will also take 9 seconds to hit the ground.
The acceleration due to gravity (usually denoted as g) is constant at approximately 9.8 m/s² on Earth, which means that in a vacuum, all objects fall at the same rate regardless of their mass.
This principle is often demonstrated in physics classrooms and can be counterintuitive because we see different objects fall at different speeds in everyday life due to air resistance.
the distance a softball is pitching from mound to the batter is
Table tennis the path of a table-tennis ball after being hit and hitting the surface of the table can be modeled by the function h=-4.9t(t-0.42) where h is the height in meters above the table and t is the time in seconds. how long does it take the ball to hit the table?
We are given the equation:
h = -4.9 t (t – 0.42)
In this problem, to solve for the time when the ball hit the table, the height h must be equal to zero. That is, h = 0 so that:
0 = - 4.9 t (t – 0.42)
0 = (t – 0.42)
t = 0.42 seconds
Which is the ability to move a joint through its entire range of motion?
Find the force a 68.5 kg person would experience while standing on the surface of mars. mars has a mass of 6.43 x 10 23 kg and a radius of 3.43 x 10 6 m from its center to the surface.
The most abundant state of matter in the universe is also the state with the most kinetic energy. That is
Answer: The Answer is Plasma
Explanation:
Answer:
C. Plasma
Explanation:
it was blue he vented